For 12.5A circuit protection, 021612.5MXP is a Littelfuse 216 Series option; cartridge, mx bulk packaging, with published series ratings and ordering-specific configuration.
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Littelfuse identifies 021612.5MXP as a 12.5A member of the 216 Series, intended for fast-acting 5×20mm ceramic fuse applications. The selected part uses cartridge, mx bulk packaging. The full ordering code specifies cartridge, mx bulk packaging, so package and lead details should be matched exactly. It is rated 250 V AC and the datasheet lists 1500 A @ 250 VAC interrupting capability. Nominal melting I²t is 175 A²s. Verify ambient derating, coordination and the exact manufacturer ordering code against the current Littelfuse datasheet before design-in.
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